All-out horsepower cam for 124” and larger enginesDesigned specifically for use with monster bores and ported heads (not recommended for stock bore engines)Kits include all required bearings, o-rings and hardwareTouring models require heavy duty valve spring kitRequires Quikee adjustable pushrods with cover keepersTappets should be replaced every time that the cam is replaced, S&S suggest Precision Tappet set without HL2T Kit and Tappet Cuffs for M8 models.Made in the USA